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#include "c_timing.h"
#if _POSIX_TIMERS > 0
#include <time.h>
static struct timespec start = {0};
static struct timespec end = {0};
static jlong partial = 0;
jboolean native_timing_supported() {
return JNI_TRUE;
}
jlong native_timing_resolution() {
struct timespec timeval;
clock_getres(CLOCK_MONOTONIC, &timeval);
return timeval.tv_nsec;
}
void native_timing_start() {
partial = 0;
clock_gettime(CLOCK_MONOTONIC, &start);
}
void native_timing_pause() {
clock_gettime(CLOCK_MONOTONIC, &end);
partial += (end.tv_sec - start.tv_sec) * 1000000000 + (end.tv_nsec - start.tv_nsec);
}
void native_timing_restart() {
clock_gettime(CLOCK_MONOTONIC, &start);
}
void native_timing_stop() {
clock_gettime(CLOCK_MONOTONIC, &end);
}
jlong native_timing_last() {
jlong res = (end.tv_sec - start.tv_sec) * 1000000000 + (end.tv_nsec - start.tv_nsec) + partial;
if (res < 0) {
return 0;
} else {
return res;
}
}
#elif defined(__WIN32__) || defined(_MSC_VER)
#include <Windows.h>
static LARGE_INTEGER start = {0};
static LARGE_INTEGER end = {0};
static jlong partial = 0;
jboolean native_timing_supported() {
return JNI_TRUE;
}
jlong native_timing_resolution() {
LARGE_INTEGER freq;
QueryPerformanceFrequency(&freq);
return 1000000000 / freq.QuadPart;
}
void native_timing_start() {
partial = 0;
QueryPerformanceCounter(&start);
}
void native_timing_pause() {
QueryPerformanceCounter(&end);
partial = (end.QuadPart - start.QuadPart) * native_timing_resolution();
}
void native_timing_restart() {
QueryPerformanceCounter(&start);
}
void native_timing_stop() {
QueryPerformanceCounter(&end);
}
jlong native_timing_last() {
jlong res = (end.QuadPart - start.QuadPart) * native_timing_resolution() + partial;
if (res < 0) {
return 0;
} else {
return res;
}
}
#else
jboolean native_timing_supported() {
return JNI_FALSE;
}
jlong native_timing_resolution() {
return 0;
}
void native_timing_start() {}
void native_timing_pause() {}
void native_timing_restart() {}
void native_timing_stop() {}
jlong native_timing_last() {
return 0;
}
#endif
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